Arrangement of components in a fluid energy machine and assembly method

ABSTRACT

An assembly method and an arrangement of components in a fluid energy machine, in particular a turbocompressor, with a longitudinal axis. The arrangement includes: an inner bundle to be arranged in an outer casing of the fluid energy machine, a low-pressure unit of the fluid energy machine, at least one cover of the fluid energy machine for the axial end-side closure of the outer casing on at least one end side, wherein these components are arranged axially adjacent to one another in the sequence cover, low-pressure unit, inner bundle and the cover is releasably attached to the low-pressure unit and the inner bundle is releasably attached to the low-pressure unit such that there results a transportable unit.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is the US National Stage of International ApplicationNo. PCT/EP2015/058412 filed Apr. 17, 2015, and claims the benefitthereof. The International Application claims the benefit of GermanApplication No. DE 102014207461.4 filed Apr. 17, 2014. All of theapplications are incorporated by reference herein in their entirety.

FIELD OF INVENTION

The invention relates to an arrangement of components of a fluid energymachine, in particular of a turbocompressor, with a longitudinal axis,comprising an inner bundle for arrangement in an outer housing, alow-pressure insert, and at least one cover for the axial face-sideclosure of the outer housing at at least one face side.

BACKGROUND OF INVENTION

Such fluid energy machines or arrangements of the type mentioned in theintroduction are already known from, for example, EP 2 024 646 B1 or EP1 952 030 B1. The latter document also describes an assembly method fora turbocompressor described therein. A fluid energy machine, in the caseof which an axial face-side cover is provided for closing off a shellpart of an outer housing, is already known from WO 2012/041757 A1.

U.S. Pat. No. 3,927,763 and DE 10 2012 203 144 A1 have already disclosedpot-type compressors with a face-side closure cover of the outerhousing.

A field of use of the invention is that of turbo-type fluid energymachines, in particular turbocompressors, which have a so-called pothousing, wherein said pot housing has a shell part which is open axiallyat the face side on both sides and which is closed off in pressure-tightfashion axially at the face side by way of covers. As presented in EP 1952 030 B1, so-called inner bundles are inserted axially into saidpressure-type outer housing pots, wherein, in general, a rotor equippedwith impellers extends axially in the coaxial center of the innerbundle.

A field of use of the invention furthermore lies in the field ofcentrifugal operating machines, that is to say radial turbocompressorsor radial turboexpanders. All embodiments here which relate to radialturbocompressors also apply, mutatis mutandis, with a correspondingreversal of the flow direction, to radial turboexpanders.

Geometric statements such as radial, axial, tangential orcircumferential direction always relate—unless stated otherwise—to thecentral axis of the longitudinal extent of the inner bundle, of theouter housing or of the axis of rotation of the rotor, wherein said axesare substantially coincident aside from slight planned ortolerance-induced deviations which are not of relevance for the presentinvention. Planned deviations may arise for example fromrotational-speed-dependent changes of the oil film of oil bearings.

The assembly of a radial turbomachine in an axial direction is alwaysassociated with particularly great outlay, because the so-called innerbundle, connected to further components, for example the rotor, must beassembled to form a transportable unit and must be inserted axiallywithout damage into the pot housing, which is generally of cylindricalform. Here, damage can be caused to adjacent components, for example tothe corresponding cover seals or to the shaft seals, or damage can becaused in the event of an offset of the rotor relative to the staticcomponents—that is to say the stator—of said transportable unit.

Assembly utilizing gravitational force by way of a vertical insertion ofsaid transportable unit into the outer housing is often ruled out atleast at the operating site, because this necessitates a crane in themachine hall, which has a corresponding lifting height and loadcapacity. Furthermore, said assembly must subsequently be rotated intothe operating position again, which likewise harbors the risk of damageand necessitates a reorientation of the housing.

EP 1 952 030 B1 addresses this in that, on the outer housing, a runningsurface is provided, and the assembled arrangement composed of a rotor,an inner bundle and further components is inserted axially into theouter housing by way of an additional apparatus, wherein the additionalapparatus is substantially in the form of a horizontal C-shaped hook,such that one limb of the C is supported on the top of the outer housingand the other limb is affixed in flexurally rigid fashion to the innerbundle or is partially formed by the inner bundle. Such an apparatus hasonly a limited load capacity and is therefore suitable only for machinesup to a particular structural size. Owing to the high torques, theapparatus can be easily deformed.

SUMMARY OF INVENTION

Taking the highlighted problems and disadvantages of the prior art as astarting point, it is an object of the invention to provide anarrangement of the type mentioned in the introduction, which arrangementpermits, in particular, efficient assembly and at the same time does notincrease the installation outlay.

It is a further aim of the invention to improve the standardization fordifferent structural sizes of a fluid energy machine or of a radialturbocompressor.

The invention solves the above disadvantages and problems of the priorart by way of an arrangement and by way of a method as per theindependent claims. The respectively back-referenced subclaims compriseadvantageous refinements of the invention.

In the context of the invention, a fluid energy machine is to beunderstood to mean a turbomachine which converts technical work intoflow work or vice versa. The invention in particular relates to a radialturbocompressor. The invention is basically also applicable, mutatismutandis, with a corresponding flow reversal, to radial turboexpanders.In particular, the so-called inner bundle of the arrangement is intendedfor being arranged in an outer housing or an outer housing shell of afully assembled machine.

In the nomenclature of the invention, the attribute “face”, for examplein the case of “face side” or “at the face side”, is defined in relationto the longitudinal axis, and refers to an areal extent with a surfacenormal in the direction of the longitudinal axis.

Here, the inner bundle comprises in particular the static flow-guidingcomponents, which can also be referred to as flow stators or simply asstators. In the fully assembled arrangement of the fluid energy machine,a rotor extends along the central longitudinal axis of the inner bundle,which rotor has impeller blades or at least one impeller. In the case ofa radial turbomachine, the inner bundle generally comprises the returnstages by means of which, in the case of a compressor, the flow is,downstream of each impeller, returned radially inward from a radiallyoutward direction. Furthermore, the so-called return stages have thetask of imparting a different swirl to, or changing the swirl of, orsubstantially eliminating the swirl from the preceding impeller or theimpeller blade stage from, the process fluid which absorbs or outputsthe flow work.

The component referred to by the independent claim as “low-pressureinsert” is, in the case of the radial turbocompressor, the flow guide ofthe inlet into the machine, and is also commonly referred to asinduction insert. In general, and advantageously, a radialturbocompressor with an arrangement according to the invention has aprocess fluid supplied to it radially during operation, and is, by wayof the low-pressure insert, distributed on the circumference about theaxis of rotation or longitudinal axis of the machine and diverted intothe axial direction and supplied to the inlet of the first impeller.

In the context of the invention, an outer housing for an arrangementaccording to the invention is in the form of a substantially cylindricalshell which, axially at the face side, advantageously on both sides, isdesigned to be closable, or is closed, by way of a cover. Said twocovers advantageously have an identical axial fitting direction. Thismeans that the cover, affixed according to the invention to thetransportable unit, is led axially through the shell-like,advantageously internally cylindrical, structure of the outer housing inthe direction of the final position of the cover.

During the axial movement, the inner bundle of the transportable unitadvantageously reaches a final position which is advantageously definedby an axial abutment in the outer housing for the inner bundle.

In said position of the transportable unit, the cover may already bearranged in its axial final position, wherein said cover closes off theouter housing axially at the face side on one side.

Alternatively, and advantageously, the cover is, in said axial position,moved axially away from the inner bundle in the direction of a finalaxial position.

In both cases, it is advantageous, in the case of a radialturbocompressor, for a radial projection to be provided on the outerhousing shell, which projection projects radially inward and on whichprojection the cover is supported so as to be prevented from beingoffset axially out of the outer housing shell. Said support absorbs theinternal pressure acting on the cover in the case of the compressor.

In the case of the cover being separated from the inner bundle duringthe course of the assembly process, it is expedient for the cover to bepulled axially into the final position by way of a pulling apparatusprovided on the outer housing. This may be realized for example by wayof molded pieces or lugs provided on the outer housing and by way ofscrews that interact therewith, wherein for example the screws, whichextend through a recess in the lugs, pull the cover axially in thedirection of a final position when said screws are screwed in each caseinto a counterpart thread provided in the cover. This arrangement canpermanently fix the cover in the final position on the outer housingduring operation, such that the cover is securely positioned even in thepresence of a negative pressure in the outer housing.

The shoulder in the outer housing for the cover is advantageouslyprovided over the entire circumference and has at least one seal orinteracts with a seal or with a seal carrier, such that, in the presenceof an internal positive pressure, the cover of the transportable unit isforced axially outward and bears sealingly against said seal of theouter housing.

In the context of the invention, a transportable unit is to beunderstood to mean that the unit can be moved from a pre-assembly siteto a final assembly site by way of conventional transportation aidswithout being damaged. The transportation aids include, for example,vehicles with corresponding support apparatuses and also cranes which,by way of corresponding load attachment means on the transportable unit,can lift said unit and also move it in a horizontal direction. Here, thetransportable unit is provided for being fastened at defined suspensionpoints by way of the attachment means and otherwise requires noadditional stabilization, but rather inherently exhibits adequatestiffness such that no damaging offsetting of the individual componentsrelative to one another occurs.

The arrangement according to the invention permits a particularlyefficient process of assembly of a corresponding fluid energy machine,because the mounting of a cover in the shell-like outer housing for theaxial face-side closure on one side of the outer housing and the axialinsertion of the inner bundle and of the low-pressure insert can beperformed in a single assembly step. The arrangement composed of thecover, the low-pressure insert and the inner bundle is advantageouslyalso assigned the rotor, which extends along the longitudinal axis ofthe inner bundle or the axis of rotation of the rotor coaxially throughsaid components, in such a way that said components surround the rotorin ring-shaped fashion at certain axial positions provided for thatpurpose. The rotor is advantageously fixed radially and axially in thearrangement. Here, the rotor advantageously does not have the task ofimparting a centering or fixing action.

In a conventional embodiment, it is necessary for a cover to be arrangedon or affixed to the outer housing shell in a separate mounting stepbefore the rotor and/or the inner bundle are inserted into the outerhousing.

Said configuration of the arrangement according to the invention isparticularly advantageous if the outer housing is closed off axially atthe face side on both sides by way of in each case one cover, whereinthe first cover has the same axial assembly direction as the secondcover and must accordingly be led in an axial direction through theouter housing shell before it reaches its final position.

The arrangement according to the invention therefore promotes thestandardization of a fluid energy machine with an arrangement accordingto the invention, because, during the course of the standardization ofthe outer housing, it is advantageously the case that only the one ormore covers is/are designed individually for a particular structuralsize, or advantageously, the one or more covers is/are also of identicaldesign for a range of structural sizes and is/are merely carrier(s) forindividualized other assemblies. Said individualized other assembliesinclude in particular a shaft seal affixed to the cover, which shaftseal is also supported on the cover, and a bearing unit which is affixedto and supported on the cover, which bearing unit serves for the radialand/or axial mounting of the rotor. Such a modular construction withindividualization of the cover assemblies permits a uniform design ofthe outer housing shell across a range of structural sizes of the fluidenergy machine.

Another embodiment of the invention provides that the inner bundle isdetachably fastened to the low-pressure insert and the cover isdetachably fastened to the low-pressure insert such that said threecomponents are secured relative to one another so as to be preventedfrom being offset axially, radially and in a circumferential direction.Here, it is advantageously possible for a shaping of the cover extendingin the circumferential direction to be coordinated with a secondshaping, extending in the circumferential direction, of the low-pressureinsert, such that radial centering of said two components with respectto one another is realized when they are in abutting contact. For adefined position in the circumferential direction with respect to oneanother, it is possible for in each case at least one centering pin tobe provided between the individual components, which centering pin isinserted in form-fitting fashion into corresponding recesses of the twoadjacent components. The intermediate bases and the low-pressure insertare braced against one another, in particular in the direction of thelongitudinal axis, that is to say advantageously horizontally, by way ofscrews or similar fastening elements.

The cover, which is moved axially through the outer housing in thedirection of the final position, may be detachably fastened to thelow-pressure insert or positioned there in centered fashion by beingplaced on loosely. In order that the cover is correctly positioned inthe circumferential direction, it is expedient for the circumferentialposition on the inner bundle or on the low-pressure insert to besecured, for example by way of a centering pin.

An axial fixing of the cover, as a constituent part of the transportableunit, to the transportable unit is advantageously designed such thatsaid fastening is removable from the outside—that is to say from outsidethe outer housing—in the fully assembled state. This may particularlyexpediently be realized by way of a first mounting sleeve which axiallysupports the cover on the rotor, wherein the rotor extends through anopening of the cover.

Here, it is advantageous for the cover to also be a carrier of a shaftseal in order to seal off the gap between rotor and cover duringoperation.

For this purpose, too, it is the case in a preferred embodiment of theinvention that the low-pressure insert is formed in one piece in acircumferential direction, comprising a cover-side first flow contour,guide vanes and a bundle-side second flow contour, wherein the cover isaffixed to the first flow contour, and the inner bundle to a second flowcontour by way of fastening options already discussed above. Here, itmay advantageously be provided that the guide vanes are the only directconnection between the cover-side first flow contour and the bundle-sidesecond flow contour. The low-pressure insert may in this case be formedfor example as a welded construction, in the case of which the guidevanes are welded to the flow contour. Another possibility is provided bymilling machining proceeding from a unipartite solid or by way of sparkerosion. Another possibility for the manufacture of the low-pressureinsert consists in the use of additive manufacturing methods, forexample by way of laser sintering.

In order that, in the region of a parting joint of the low-pressureinsert, no complicated seal arrangements are required in the region ofthe vicinity of the outer housing, it is advantageous if thelow-pressure insert is of undivided form in the circumferentialdirection, or has no parting joint extending in a radial direction. Interms of assembly, this embodiment is possible according to theinvention because, in general, the low-pressure insert can be pushedaxially onto the rotor, which is generally combined with the innerbundle in form-fitting fashion, and affixed to the inner bundle. In thesame way, the cover is advantageously pushed onto the rotor or affixedto the low-pressure insert. In order that no axial division of the rotoris required, it is expedient if the inner bundle or the assembly ofreturn stages in the case of a radial machine is of divided form in acircumferential direction at a parting joint. Here, it is furthermoreexpedient for the inner bundle to be composed of axial inner bundlesubsections which are individually of divided form in each case at aparting joint. Here, it is expedient for the individual inner bundlesections to each have a lower part and an upper part, and for the lowerparts of the inner bundle subsections to be able to be joined togetheraxially to form an inner bundle lower part, and the upper part of theinner bundle subsections can be combined, by being detachably fastenedto one another axially, to form an inner bundle upper part, in that boththe inner bundle lower part and the inner bundle upper part individuallyform a transportable unit as an intermediate step of the assemblyprocess.

The arrangement according to the invention advantageously has, in anaxial extension on that side of the inner bundle which is averted fromthe cover or from the low-pressure insert, a high-pressure collectorwhich is advantageously of undivided form in a circumferentialdirection. Said undivided form of the high-pressure collector also hasadvantages with regard to the elimination of the need for a seal for aparting joint.

In order for the rotor to be added, without being damaged, to thearrangement according to the invention as a transportable unit, it isexpedient for the first mounting sleeve to be provided which supportsthe rotor radially on the cover during transportation of thetransportable unit comprising the rotor. Said first mounting sleeve isexpediently designed so as to be removable axially from the outer sideof the cover. Accordingly, it is advantageously the case that, firstly,the cover is affixed, detachably fastened or loosely placed on to thelow-pressure insert in centered fashion, and subsequently, the firstmounting sleeve is affixed, as a centered support for the rotor, to thecover. In this way, the rotor is guided concentrically with respect tothe longitudinal axis in the inner bundle. For the purposes of supportof the rotor with a centering action, it is expedient for a secondmounting sleeve to be provided between the rotor and the high-pressurecollector and to support the rotor on the high-pressure collector. Thesecond mounting sleeve is also advantageously designed such that it canbe removed from the outside from the arrangement after completedinsertion into the outer housing. Here, at least one mounting sleeve maybe of divided form in the circumferential direction and assembled by wayof fastening elements such that the rotor is radially clamped. It isadvantageous for at least one mounting sleeve, or both mounting sleeves,to bare not only radially against the rotor but also axially against arotor shoulder, such that an axial offset is prevented owing to the formfit for the mounting sleeves with respect to the inner bundle, the coverand the low-pressure insert.

This axial securing of at least one mounting sleeve, advantageously ofboth mounting sleeves, permits the axial securing, already discussedabove, of the cover, which is advantageously arranged axially loosely onthe low-pressure insert and by means of which the first mounting sleevecan be secured axially.

BRIEF DESCRIPTION OF THE DRAWINGS

Below, the invention will be discussed in more detail on the basis of aspecific exemplary embodiment with reference to drawings, in which:

FIGS. 1-5 show, in each case in an illustration of a longitudinalsection, an arrangement A comprising components of a fluid energymachine FEM.

DETAILED DESCRIPTION OF INVENTION

All directional statements such as axial, radial, tangential orcircumferential direction always relate—unless stated otherwise—to thelongitudinal axis X of the rotor. The longitudinal axis X of the rotor Rcorresponds to the axis of rotation of the rotor R during operation. Thecentral longitudinal axes of the impellers, of the inner bundle IB, ofan outer housing OC, of a cover COV, of a low-pressure insert LPU and ofa collector COL run in substantially coincident fashion, aside fromplanned or unplanned deviations which are not relevant in the context ofthe invention.

FIGS. 1-5 show, in each case in an illustration of a longitudinalsection, an arrangement A comprising components of a fluid energymachine FEM, specifically of a turbocompressor TCO, with a longitudinalaxis X. Here, FIGS. 1-5 show different stages of the assembly of thecomponents in the context of an assembly process in successive steps,wherein FIG. 1 illustrates the smallest number of components and FIG. 5illustrates the greatest number of components.

In FIG. 1, lower parts of axial inner bundle subsections RS1, RS2, RS3have been assembled axially on one another axially along thelongitudinal axis X to form an inner bundle lower part IBL of an innerbundle IB. The lower parts of axial inner bundle subsections RS1, RS2,RS3 have been fastened to one another by way of screws. A rotor Rextending along the axis X with four impellers IMP1, IMP2, IMP3, IMP4arranged in succession has been lowered into the inner bundle lower partIBL. Here, measures are implemented to ensure that the rotor R does notlie directly, for example via shaft seals, on the inner bundle lowerpart IBL and cause damage.

FIG. 2 shows the assembly sequence that follows the illustration of FIG.1, in which an inner bundle upper part IBU assembled axially from axialconstituent parts has been mounted radially onto the inner bundle lowerpart IBL, so as to yield a complete inner bundle IB through which therotor R extends along its longitudinal axis X. The longitudinal axis Xextends substantially along a parting joint plane of the inner bundleIB. In this way, the rotor R has been connected in form-fitting fashionto the inner bundle IB, because the individual impellers IMP1, . . . ,IMP4 of the rotor R are fixedly affixed to a shaft SH of the rotor R,for example by way of a shrink fit. In order that the shaft SH can be ofaxially undivided form, the inner bundle IB, or the constituent parts ofthe inner bundle IB, are designed such that they can be broken down intolower parts and upper parts—that is to say divided in thecircumferential direction at the parting joint.

FIG. 3 shows a further stage of the assembly of the arrangement A. Alow-pressure insert LPU has now been mounted onto the inner bundle IB inan axial direction and has been connected axially to the inner bundle IBby way of fastening elements FEL

Like the individual axial subsections RS1, RS2, RS3 of the inner bundleIB, the low-pressure insert LPU is also equipped with a central axialopening, such that the rotor R or the shaft SH of the rotor R can extendthrough said opening. By contrast to the components of the inner bundleIB, the low-pressure insert LPU is of undivided form in acircumferential direction. The low-pressure insert LPU has a first flowcontour IGV1 averted from the inner bundle IB and has a second flowcontour IGV2 which is situated relatively close to the inner bundle IB,wherein the first flow contour IGV1 is fixedly connected to the secondflow contour IGV2 by way of guide vanes VA. The axial fastening by wayof the first fastening elements FE1 of the low-pressure insert LPU tothe inner bundle IB is configured such that the second flow contour IGV2is fixedly screwed to the inner bundle IB. The first flow contour IGV1is in this case fastened to the second flow contour IGV2 only by way ofthe guide vanes VA. The guide vanes VA are in this case advantageouslyformed in one piece with the two flow contours IGV1, IGV2. Saidunipartite form may advantageously be realized by way of welding, orelse may be the result of a manufacturing process proceeding from asolid. In the case of manufacturing from a solid, use may be made of acutting machining process or machining by way of spark erosion. Analternative manufacturing method for the low-pressure insert LPU isprovided by the relatively new method of “additive manufacturing” (forexample laser sintering or selective laser melting). In the radialdirection, the low-pressure insert LPU is positioned on the inner bundleIB by way of a first centering section CS1. Furthermore, an assembly aidis provided by way of dowel pins PB1, such that incorrect or wronglypositioned installation of the inner bundle IB relative to thelow-pressure insert LPU in the circumferential direction is alsoprevented.

On the side illustrated axially on the right in FIG. 3, opposite theside of the low-pressure insert LPU, there is also affixed to the innerbundle IB a collector COL which is centered and fastened axially on theinner bundle IB. Here, a third abutment shoulder ensures correct radialorientation of the collector COL on the inner bundle IB.

Furthermore, the collector COL is secured relative to the inner bundleIB by way of fastening elements FE3.

In order that damaging contact does not occur between the rotor R andthe stator parts cover COV, inner bundle IB and collector COL, a firstmounting sleeve AS1 (see FIGS. 4, 5) is affixed to the cover COV, and asecond mounting sleeve AS2 is affixed to the collector COL, whichmounting sleeves secure the rotor R on said two components so as toprevent it from being offset and serve as a support for supporting theweight force and other forces.

FIG. 4 shows the situation of the insertion of the arrangement A into anouter housing OC in which an insertion aid ASS also supports theinsertion of the arrangement A counter to the weight force and orientsthe arrangement A centrally. Before the insertion as in FIG. 4 isperformed, the cover COV is mounted onto the component combinationillustrated in FIG. 3, which component combination is arranged axiallyon the low-pressure insert LPU. By way of dowel elements PB2, the coverCOV is also secured on the low-pressure insert LPU so as to be preventedfrom rotating in a circumferential direction, and a second centeringshoulder CS2 ensures a correct radial orientation of the cover COV onthe low-pressure insert LPU. Axially, the cover is fixed to the rotor byway of the first mounting sleeve AS1, which rotor is held axially inposition in the second mounting sleeve AS2. The unit TU thus formed isthen mounted onto the insertion aid ASS.

The two mounting sleeves AS1, AS2 can be dismounted from the cover COVfrom the outer side and also mounted again and can be dismounted fromthe collector COL from the outside and also mounted again. The secondmounting sleeve AS2 is of divided form in the circumferential direction,such that the rotor R or the shaft SH of the rotor R can be fixedlyclamped in the radial direction by the mounting sleeve AS2 in a mannerwhich is not illustrated. An axial offset of the shaft SH with respectto the mounting sleeves AS1, AS2 is furthermore prevented by axialabutment of in each case one radial shoulder of the shaft SH against therespective mounting sleeve AS1, AS2. On the cover COV and on thecollector COL there are provided, in each case, suspension points CON,by means of which the arrangement A including the rotor R can besuspended and moved as a transportable unit TU. Following an axialinsertion of the arrangement A into the outer housing OC, the mountingsleeves AS1, AS2 are removed from the arrangement A. Following theinsertion into the outer housing OC, the cover COV comes to bear againsta shoulder of the outer housing OC from the inside. Here, after a finalposition of the inner bundle is reached, the cover COV is advancedaxially from the inner bundle and is pulled into its axial finalposition. Here, a separate seal carrier (not illustrated) can ensurethat the cover COV bears sealingly against the outer housing OC.Alternatively, a seal may also be provided in the outer housing OC or inthe cover COV at a suitable location—in particular so as to makeabutting contact in the axial direction.

In FIG. 5, it is illustrated that a first attachment point HP1 isprovided on the cover COV and a second attachment point HP2 is providedon the high-pressure collector COL, and the elements cover COV,low-pressure insert LPU, inner bundle IB, high-pressure collector COLare detachably fastened to one another such that the elements can betransported in suspended fashion, without being offset relative to oneanother, at the attachment points HP1, HP2 without further support. Forthis purpose, said transportable unit TU is suspended by the attachmentpoints HP1, HP2 on a traverse LF which permits suspension withoutlateral forces.

The transportable unit TU or the arrangement A has at least one rollerW1, advantageously a roller pair, by means of which the arrangement A isdisplaceable on the insertion aid ASS and in the interior of the outerhousing OC with low friction such that the arrangement A can be movedinto the final mounting position in the outer housing OC. A secondroller W2 is provided on a mounting bracket ASS2 which is affixedaxially to the collector COL and which permits additional orientation inthe radial direction of the arrangement A on the insertion aid ASS andin the outer housing OC before the final position is reached.

1.-13. (canceled)
 14. An arrangement (A) of components of a fluid energymachine (FEM), with a longitudinal axis (X), comprising: an inner bundle(TB) for arrangement in an outer housing (OC) of the fluid energymachine (FEM), a low-pressure insert (LPU) of the fluid energy machine(FEM), at least one cover (COV) of the fluid energy machine (FEM) forthe axial face-side closure of the outer housing (OC) at at least oneface side, wherein the arrangement is designed such that, duringassembly, the cover (COV) is led axially through the shell-likestructure of the outer housing (OC) into an operationally ready finalposition, wherein, in said final position, the cover (COV) closes offthe outer housing (OC) axially at the face side on one side, wherein,following the insertion into the outer housing (OC), the cover (COV)comes to bear against a shoulder of the outer housing (OC) from theinside, wherein said components are arranged axially adjacent in thesequence cover (COV), low-pressure insert (LPU), inner bundle (TB), andwherein the cover (COV) is detachably fastened to the low-pressureinsert (LPU) and the inner bundle (TB) is detachably fastened to thelow-pressure insert (LPU) such that a transportable unit (TU) is formed.15. The arrangement (A) as claimed in claim 14, wherein a high-pressurecollector (COL) is arranged axially adjacent to the inner bundle (TB)and is detachably fastened to the inner bundle (TB), such that thetransportable unit (TU) comprises the following modules in the statedaxial sequence: cover (COV), low-pressure insert (LPU), inner bundle(TB), high-pressure collector (COL).
 16. The arrangement (A) as claimedin claim 14, wherein the inner bundle (TB) is detachably fastened to thelow-pressure insert (LPU) and the cover (COV) is detachably fastened tothe low-pressure insert (LPU), or the inner bundle (TB) is detachablyfastened to the low-pressure insert (LPU) and the cover (COV) isdetachably fastened to the low-pressure insert (LPU) and thehigh-pressure collector (COL) is detachably fastened to the inner bundle(TB) or the inner bundle (TB) is detachably fastened to the low-pressureinsert (LPU) and the cover (COV) is fixed by way of a rotor (R), whichis inserted into the inner bundle (TB) and secured there axially in aposition, to the low-pressure insert (LPU) and the high-pressurecollector (COL) is detachably fastened to the inner bundle (TB) suchthat said components are in each case secured relative to one another soas to be prevented from being offset axially, radially and in acircumferential direction.
 17. The arrangement (A) as claimed in claim16, wherein a first attachment point (HP1) is provided on the cover(COV) and a second attachment point (HP2) is provided on thehigh-pressure collector (COL), and the elements cover (COV),low-pressure insert (LPU), inner bundle (TB), high-pressure collector(COL) are detachably fastened to one another such that the elements canbe transported in suspended fashion, without being offset relative toone another, at the attachment points (HP1, HP2) without furthersupport.
 18. The arrangement (A) as claimed in claim 14, wherein thelow-pressure insert (LPU) is formed in one piece, comprising acover-side first flow contour (IGV1), guide vanes (VA) and aninner-bundle-side second flow contour (IGV2), wherein the cover (COV) isfastened to the first flow contour (IGV1) and the inner bundle (TB) isfastened to the second flow contour (IGV2).
 19. The arrangement (A) asclaimed in claim 14, wherein the low-pressure insert (LPU) is ofundivided form in the circumferential direction.
 20. The arrangement (A)as claimed in claim 14, wherein the inner bundle (TB) or axial innerbundle subsections (RS1, RS2, RS3) of the inner bundle (TB) is/areformed so as to be divided in the circumferential direction at a partingjoint.
 21. The arrangement (A) as claimed in claim 15, wherein thehigh-pressure collector (COL) is of undivided form in thecircumferential direction.
 22. The arrangement (A) as claimed in claim15, wherein a rotor (R) extends along the longitudinal axis (X), and thecomponents cover (COV), low-pressure insert (LPU), inner bundle (TB),high-pressure collector (COL) surround the rotor (R) in each case inring-shaped fashion in the circumferential direction.
 23. Thearrangement (A) as claimed in claim 22, wherein the rotor (R) issupported and fastened radially on the cover (COV) by way of a firstmounting sleeve (AS1).
 24. The arrangement (A) as claimed in claim 22,wherein the inner bundle (IB) is detachably fastened to the low-pressureinsert (LPU) and the cover (COV) is detachably fastened to thelow-pressure insert (LPU), or the inner bundle (IB) is detachablyfastened to the low-pressure insert (LPU) and the cover (COV) isdetachably fastened to the low-pressure insert (LPU) and thehigh-pressure collector (COL) is detachably fastened to the inner bundle(IB) or the inner bundle (IB) is detachably fastened to the low-pressureinsert (LPU) and the cover (COV) is fixed by way of a rotor (R), whichis inserted into the inner bundle (IB) and secured there axially in aposition, to the low-pressure insert (LPU) and the high-pressurecollector (COL) is detachably fastened to the inner bundle (IB) suchthat said components are in each case secured relative to one another soas to be prevented from being offset axially, radially and in acircumferential direction; and wherein the rotor (R) is radiallysupported and fastened on the high-pressure collector (COL) by way of asecond mounting sleeve (AS2).
 25. The arrangement (A) as claimed inclaim 23, wherein the rotor (R) is fastened axially unidirectionallyand/or bidirectionally by way of the first mounting sleeve (AS1) and/orby way of the second mounting sleeve (AS2).
 26. A method for assemblingan arrangement (A) as claimed in claim 14, the method comprising: a)providing an inner bundle lower part (IBL), b) inserting a rotor (R)into the inner bundle lower part (IBL), c) placing on an inner bundleupper part (IBO), d) fastening the inner bundle upper part (IBO) to theinner bundle lower part (IBL) to form an inner bundle (IB), e) axiallyattaching a low-pressure insert (LPU) to the inner bundle (IB), axiallyattaching a cover (COV) to the low-pressure insert (LPU) and interposinga first mounting sleeve (AS1) between the rotor (R) and the cover (COV),axially attaching the outlet collector (COL) to the inner bundle (TB)and interposing a second mounting sleeve (AS2) between the rotor (R) andthe high-pressure collector (COL), wherein the first mounting sleeve(AS1) and the second mounting sleeve (AS2) of the cover (COV) and of thehigh-pressure collector (COL) respectively can be mounted anddismounted, in each case from the axial side axially averted from theinner bundle (TB), between the rotor (R) and the cover (COV) and betweenthe rotor (R) and the high-pressure collector (COL) respectively,wherein the assembly composed of the inner bundle (TB), the low-pressureinsert (LPU), the cover (COV), the high-pressure collector (COL) and therotor (R) with the two mounting sleeves (AS1, AS2) forms a transportableunit (TU), f) axially inserting the transportable unit (TU) into anouter housing shell (OCC) of an outer housing (OC), wherein here, thecover (COV) is led axially through the shell-like structure of the outerhousing (OC) into a final position, wherein, following the insertioninto the outer housing (OC), the cover (COV) comes to bear against ashoulder of the outer housing (OC) from the inside, g) removing themounting sleeves (AS1, AS2).
 27. The arrangement (A) as claimed in claim14, wherein the fluid energy machine (FEM) comprises a turbocompressor(TCO).